For the orthographic projection as a map projection, see Orthographic projection in cartography. For mathematical discussion in terms of linear algebra, see Projection (linear algebra).
Bullfrogs are the largest real frog found in North America, weighing up to 0.5 kg and measuring 460 mm in length. Their average length is 100-175 mm. Their color varies from brownish to shades of green, often with spots or blotches of a darker color around their backs. Their back feet are fully webbed.
Grass frogs, also known as common frogs, are a common semiterrestrial frog that typically dwells in the grass. Common in Europe and also in some U.S. states, grassfrogs are insectivorous, semi-aquatic, web-footed amphibians with smooth skin and long hind legs.Source: TheFreeDictionary.rom Wikipedia :Grassfrog or  grass frogs  are usually members of the tree frog family (Hylidae), in particular of the genus Litoria.